7210 SAS-MXP, R6, R12, S, SX, T BASIC SYSTEM
CONFIGURATION GUIDE RELEASE 22.9.R1
System management
– On the 7210 SAS-S 1/10GE platform, there is no DC input failure detection that is
classified separately. In the case of a failure, the system reports the DC power value as
‟failed.”
• fan module
Failure of one or more fans does not impact traffic. Failure of a single fan is detected and notified. The
fan tray and fan module is hot-swappable:
– On the 7210 SAS-R6 and 7210 SAS-R12, the fan module/tray contains 6 fans.
– On the 7210 SAS-Mxp and 7210 SAS-T, the fan module/tray contains 3 fans.
– On the 7210 SAS-Sx 1/10GE and 7210 SAS-Sx 10/100GE, the fan module is not supported. The
devices contain a fixed set of one or more fans with filters on both sides of the chassis.
– On the 7210 SAS-S 1/10GE, the fan module is not supported. The devices contain a fixed set of one
or more fans without filters.
– On the 7210 SAS-R6 and 7210 SAS-R12, 2 x Switch Fabric/Control Processor Module (SF/CPM)
can be used to provide control plane redundancy with non-stop routing and non-stop services. The
SF/CPM is hot-swappable.
6.2.1.1.4 Service redundancy on 7210 SAS-R6 and 7210 SAS-R12
All service-related statistics are kept during a switchover. Services, SDPs, and SAPs will remain up with a
minimum loss of forwarded traffic during a CFM/CPM switchover.
6.2.1.1.5 Accounting configuration redundancy on 7210 SAS-R6 and 7210 SAS-R12
When there is a switchover and the standby CFM/CPM becomes active, the accounting servers are
checked and if they are administratively up and capable of coming online (media present, and others), the
standby is brought online; new accounting files are created at this point. Users must manually copy the
accounting records from the failed CFM/CPM.
6.2.1.2 Nonstop forwarding and routing on 7210 SAS-R6 and 7210 SAS-R12
In a control plane failure or a forced switchover event, the router continues to forward packets using the
existing stale forwarding information. Nonstop forwarding requires clean control plane and data plane
separation. Usually the forwarding information is distributed to the IMMs.
6.2.1.2.1 Nonstop forwarding on 7210 SAS-R6 and 7210 SAS-R12
In a control plane failure or a forced switchover event, the router continues to forward packets using the
existing stale forwarding information.
Nonstop forwarding is used to notify peer routers to continue forwarding and receiving packets, even if
the route processor (control plane) is not working or is in a switch-over state. Nonstop forwarding requires
clean control plane and data plane separation and usually the forwarding information is distributed to the
line cards.
3HE 18197 AAAB TQZZA
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